Thin is a very simple web server written in Ruby. It's single-threaded,
which means it can only serve one request at a time. This simplicity
affords increased speed and decreased memory usage for singled-threaded
framework like Rails.

Log message:
Set USE_GCC_RUNTIME=yes for packages which build shared libraries but do
not use libtool to do so. This is required to correctly depend upon a
gcc runtime package (e.g. gcc47-libs) when using USE_PKGSRC_GCC_RUNTIME.